Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b8407c2b52ad8a6…

MALICIOUS

PDF

88.7 KB Created: 2021-03-19 17:40:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 23233a03f5810138e81246a581ff1355 SHA-1: b82d4689892ec0ab9b6d3b4dccedf962c5a0379d SHA-256: 2b8407c2b52ad8a6aa55b22ff9c42608994f177cde6e46f200c4a0e68b335554
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains heuristics indicating it's a phishing lure, specifically using an image to redirect users to an external URL. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL `https://xezojetit.ru/strik?utm_term=raymarine+c80+mfd+manual` is the primary indicator of compromise, likely serving as a download or redirection point for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://xezojetit.ru/strik?utm_term=raymarine+c80+mfd+manual PDF link annotation
    • https://jovigazever.weebly.com/uploads/1/3/1/6/131637362/5726011.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374708/normal_5fe1f53be90c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390324/normal_601c5b84da00d.pdfIn PDF document text
    • https://gejixivipoza.weebly.com/uploads/1/3/0/9/130969358/bukorebevexigik.pdfIn PDF document text
    • https://zokuwobame.weebly.com/uploads/1/3/1/8/131856234/8000eb2980c548.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477615/normal_604991d6d4a8a.pdfIn PDF document text
    • http://sorupipor.22web.org/86721075666.pdfIn PDF document text
    • https://xonugovelixef.weebly.com/uploads/1/3/0/7/130739086/1605142.pdfIn PDF document text
    • https://riguzegadediva.weebly.com/uploads/1/3/5/3/135314075/polajajanajidomapena.pdfIn PDF document text
    • https://femutawinitogim.weebly.com/uploads/1/3/5/4/135401040/buwinupe.pdfIn PDF document text
    • https://kekipefawaro.weebly.com/uploads/1/3/4/5/134588225/c1b1c5ad103795.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuwosil/numerical_techniques_in_electromagnetics_with_matlab.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/nuzururimeteviwubonowo.pdfIn PDF document text
    • http://ledojoburug.rf.gd/the_open_window_by_saki.pdfIn PDF document text
    • http://laniferes.epizy.com/tamil_nadu_forester_exam_answer_key_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/ach_mandate_form_returned.pdfIn PDF document text
    • http://kowewewabozete.epizy.com/48464391084.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf41a5cc-4428-4ea7-996f-592457372d44/wujinitudunotikugamufopo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8456374-6bc3-4c96-be21-a98c3943e90f/juriroluxidupumusogon.pdfIn PDF document text
    • http://nurekalu.epizy.com/suvabetusutusuvof.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/46503920109.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/autocad_2010_xforce_keygen_32_64bits_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6939b302-9f82-4787-ba36-bab04b7147cf/firefly_promo_code_2020.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000112ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112EF 5436 bytes
SHA-256: cd5a2d1de1a32755909a973e42636b786ed5f266ecf55aefb3db6fbbbc36858c
font_01_sfnt_off0001255f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1255F 14364 bytes
SHA-256: b256cfdb7ea678a29a8f5f5ae2aa2e3acb7671452d28d75e661bfeff05aff3c0